CN110655281A - Distributed rural domestic sewage treatment system and treatment method - Google Patents
Distributed rural domestic sewage treatment system and treatment method Download PDFInfo
- Publication number
- CN110655281A CN110655281A CN201911079674.4A CN201911079674A CN110655281A CN 110655281 A CN110655281 A CN 110655281A CN 201911079674 A CN201911079674 A CN 201911079674A CN 110655281 A CN110655281 A CN 110655281A
- Authority
- CN
- China
- Prior art keywords
- tank
- artificial wetland
- iron
- functional artificial
- filter bed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 37
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 60
- 239000011574 phosphorus Substances 0.000 claims abstract description 60
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000000126 substance Substances 0.000 claims abstract description 41
- 239000010802 sludge Substances 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 19
- 239000000945 filler Substances 0.000 claims description 53
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 25
- 230000001105 regulatory effect Effects 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- 239000001301 oxygen Substances 0.000 claims description 17
- 229910052742 iron Inorganic materials 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 12
- -1 iron ions Chemical class 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000008635 plant growth Effects 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 239000006228 supernatant Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- ZYMCGHKVJXMQRR-UHFFFAOYSA-N dimethylarsenic Chemical compound C[As]C ZYMCGHKVJXMQRR-UHFFFAOYSA-N 0.000 claims description 2
- 230000003311 flocculating effect Effects 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims description 2
- 238000004880 explosion Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 18
- 239000004912 1,5-cyclooctadiene Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 11
- 239000010410 layer Substances 0.000 description 9
- 239000002244 precipitate Substances 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000005189 flocculation Methods 0.000 description 4
- 230000016615 flocculation Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 206010021143 Hypoxia Diseases 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000004071 biological effect Effects 0.000 description 2
- 238000010000 carbonizing Methods 0.000 description 2
- 230000002925 chemical effect Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/18—PO4-P
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention provides a treatment system and a treatment method of distributed rural domestic sewage, wherein the treatment system comprises an adjusting tank, a lifting pump, an aerobic tank, a functional artificial wetland, a chemical phosphorus removal filter bed and a sludge drying tank, the adjusting tank is provided with a sewage inlet and an anoxic zone, one end of the anoxic zone is communicated with one end of the aerobic tank, the other end of the anoxic zone is communicated with the other end of the aerobic tank through a return pipe, the aerobic tank is provided with a fan, the bottom of the aerobic tank is communicated with the sludge drying tank through a sludge discharge pipe, the top of the aerobic tank is connected with the functional artificial wetland through an overflow pipe, and the water outlet end of the functional artificial wetland is connected with the water inlet end of the chemical phosphorus removal filter bed. The invention adopts AO denitrification process to effectively remove total nitrogen, the effluent enters the functional artificial wetland to adsorb and degrade nitrogen, phosphorus and COD, and the multi-stage process of the functional artificial wetland and the chemical phosphorus removal filter bed is utilized to ensure that the effluent is stable and reaches the first grade A, thus the invention is an effective rural domestic sewage treatment means and has wide market prospect.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a treatment system and a treatment method for distributed rural domestic sewage.
Background
According to the relevant research and investigation results, the discharge amount of the agricultural pollutant Chemical Oxygen Demand (COD) accounts for 43.7% of the total discharge amount, and the agricultural Total Nitrogen (TN) and Total Phosphorus (TP) respectively account for 57.2% and 67.4% of the total discharge amount. With the improvement of the treatment rate of urban sewage and industrial wastewater, sewage discharged in rural life and production becomes an important pollution source of water body pollution in China.
The domestic and foreign rural domestic sewage treatment technology is divided into anaerobic biotechnology, aerobic biotechnology, ecological treatment technology and the like according to the principle, and the specific technical process comprises a septic tank, a methane tank, a contact oxidation tank, an ecological filter tank, a stabilization tank, an artificial wetland, land infiltration and the like. The existing rural domestic sewage treatment technology in China mainly aims at removing organic pollutants, and has low removal rate or unstable removal effect on nitrogen and phosphorus nutrient elements which are the main reasons for water eutrophication. At present, the development of sewage treatment process or equipment with high removal rate of organic matters, nitrogen and phosphorus is an important direction for the development of rural sewage treatment in the present day.
Developed countries begin early in the aspect of rural sewage control, accumulate some experiences, and the process has strong removal capability on organic pollutants and nitrogen and phosphorus nutrient salts, so that the process is worth being used for reference in China. The technology of the Japanese purification tank (Jookasou) is an integrated treatment facility technology applied to the aspect of rural dispersed sewage treatment, originates from the 60 th century in 20 th century, forms a set of relatively complete technical management system after years of development, and plays an important role in protecting the water environment in the rural areas in Japan.
By taking the experiences of the Japanese purification tank technology in the aspect of rural sewage treatment as a reference, the application prospect of the purification tank technology in the rural sewage treatment in China is explored, and the method has important significance for promoting the rural sewage treatment and improving the rural water environment. However, at present, the municipal domestic sewage discharge standard in most areas adopts the first-class A standard in the pollutant discharge standard of urban sewage treatment plants, the discharge standard is difficult to reach by adopting a standard type small purifying tank, and the defects of high investment, high operation cost, high operation and maintenance difficulty and the like exist by adopting a performance-identified purifying tank.
The traditional domestic phosphorus removal process is mainly realized by adding medicines, needs the flows of liquid medicine preparation, metering and adding, linkage control and the like, has large daily operation and maintenance amount and high energy consumption, and the traditional denitrification process needs a large amount of nitrified liquid to flow back, has large power consumption, and cannot ensure the standard reaching rate of 100 percent of total nitrogen only by a single nitrification and denitrification treatment process.
Aiming at the small treatment capacity and dispersibility of rural domestic sewage, the method is very important to find an integrated treatment facility which has the advantages of high-efficiency nitrogen and phosphorus removal, no daily maintenance and low energy consumption.
Disclosure of Invention
In order to solve the technical problems, the invention provides a treatment system and a treatment method for distributed rural domestic sewage.
The invention adopts the following technical scheme:
a treatment system of distributed rural domestic sewage comprises a regulating tank, a lift pump, an aerobic tank, a functional artificial wetland, a chemical phosphorus removal filter bed and a sludge drying tank;
the equalizing basin is provided with sewage entry and anoxic zone, the one end intercommunication of elevator pump and good oxygen pond is passed through to the one end in equalizing basin anoxic zone, the other end in equalizing basin anoxic zone pass through the back flow with good oxygen pond's other end intercommunication, good oxygen pond is provided with the fan through the pipe connection of exploding, good oxygen bottom of the pool portion through the mud pipe with sludge drying pond intercommunication, good oxygen top of the pool portion pass through the overflow pipe with functional artificial wetland is connected, functional artificial wetland's play water end with chemical dephosphorization filter bed's the end of intaking is connected, be provided with the iron and carbon filler in the chemical dephosphorization filter bed.
In the technical scheme, the treatment system is of a two-layer stacked structure formed by respectively arranging an above-ground layer and an underground layer in the vertical direction, wherein the aerobic tank and the functional artificial wetland are respectively arranged above the regulating tank and the chemical phosphorus removal filter bed, and the sludge drying tank is arranged in the underground layer.
Specifically, the depth of the regulating tank and the depth of the aerobic tank are 1.2-1.6 m.
Further, in the technical scheme, the functional artificial wetland is filled with a combined filler, the combined filler comprises gravel, iron-carbon coupled filler, crushed stone and soil, and the filling height of the combined filler is 750-880 mm.
Preferably, in the technical scheme, emergent aquatic plants are planted in the functional artificial wetland.
In the technical scheme, the iron-carbon filler (8) is prepared by mixing the following components in percentage by mass of 3: 1-1: 4, the iron powder and the carbon powder are carbonized and sintered and then mixed and granulated.
Further, in the above technical solution, the iron carbon filler (8) is an oval particle with a porous structure, the particle size is 30-50mm, and the filling height of the iron carbon filler (8) is 500-600 mm.
The invention also provides a treatment method of the distributed rural domestic sewage, which is carried out by adopting the treatment system and comprises the following steps:
s1, allowing rural domestic sewage to be treated to flow into a regulating tank, allowing the rural domestic sewage to enter an anoxic zone and then enter an aerobic tank through a lift pump, and removing total nitrogen through nitrification and denitrification under the alternate circulation between the anoxic zone and the aerobic tank of the regulating tank;
s2, periodically discharging sludge into a sludge drying tank through a sludge discharge pipe by settling at the bottom of an aerobic tank, enabling the denitrified clear water overflowing from the top of the aerobic tank to flow into a functional artificial wetland, and enabling supernatant liquid after standing in the sludge drying tank to flow back to the regulating tank;
s3, removing partial nitrogen and phosphorus and CAD through the combined action of emergent aquatic plants planted in the functional artificial wetland and the filled combined filler;
s4, carrying out iron-carbon reaction on iron-carbon fillers filled in the chemical phosphorus removal filter bed to generate iron ions, and flocculating the iron ions with sewage to generate phosphorus-containing sediment to reduce the total phosphorus content.
In the technical scheme, in the step S3, the hydraulic retention time of the functional artificial wetland is 45-52h, and the porosity is 25-36%.
In the above technical solution, in step S4, the iron-carbon filler needs to be replaced after being adsorbed and saturated, and the replacement frequency is 1 time per 1-2 years.
In the above technical solution, in the steps S1-S4, the sewage treatment scale is less than 50 tons/day, which is only suitable for the treatment of small-sized rural domestic sewage, and is suitable for the season of plant growth in spring and summer, after the effluent of the aerobic tank is treated by the functional artificial wetland, if the total phosphorus content can reach the standard, the effluent is directly discharged beyond the chemical phosphorus removal filter bed, and during the non-plant growth season in autumn and winter, the effluent of the functional artificial wetland must reach the standard after deep phosphorus removal by the chemical phosphorus removal filter bed.
In a preferred embodiment, the decentralized rural domestic sewage treatment method comprises the following steps:
step 1: rural domestic sewage to be treated flows into the equalizing basin by self, the equalizing basin in still set up anoxic zone (A section), sewage gets into good oxygen pond after the elevator pump promotes, supplies oxygen to the water through the fan, good oxygen pond mixed liquid flow back to the anoxic zone (A section) of equalizing basin, under the condition of oxygen deficiency-good oxygen is alternative, carry out the getting rid of total nitrogen in the sewage through nitrifying denitrification.
Step 2: sludge precipitated at the bottom of the aerobic tank is periodically discharged into a sludge drying tank through a sludge discharge pipe, supernatant liquid of the sludge after standing and precipitation flows back to the regulating tank, and the sludge precipitated at the bottom is naturally dried through evaporation; clear water overflowing from the top of the aerobic tank automatically flows into the functional artificial wetland.
And step 3: emergent aquatic plants are planted in the functional artificial wetland, a combined filler which takes gravels, iron-carbon coupled fillers, broken stones and soil as main components is filled in the functional artificial wetland, the purification treatment of sewage is cooperatively completed by utilizing the adsorption and degradation effects of developed root systems of aquatic plants and the complex physical, chemical and biological effects of substrates, plants and microorganisms, a part of nitrogen, phosphorus and COD are removed, and the discharged water is discharged into a chemical phosphorus removal filter bed.
And 4, step 4: the chemical phosphorus removal filter bed is internally provided with iron-carbon particle fillers, elemental iron loses electrons by using iron-carbon reaction to generate iron ions, the iron ions and sewage undergo flocculation reaction to generate phosphorus-containing precipitates, and the precipitates are adsorbed on the surfaces of the iron-carbon particle fillers, so that the total phosphorus content in the water is reduced, and the effluent of the chemical phosphorus removal filter bed can reach the first-class A standard (GB18918-2002) of pollutant discharge Standard of urban Sewage treatment plants.
The method of the invention has the following characteristics and beneficial effects:
(1) the invention adopts AO denitrification process can effectively remove total nitrogen, the effluent enters the functional artificial wetland, the developed root system of aquatic plants is utilized to adsorb and degrade pollutants such as nitrogen, phosphorus, COD and the like, finally, the chemical phosphorus removal filter bed is utilized to carry out deep phosphorus removal, and the multi-stage process guarantee can ensure that 100 percent of the effluent can stably reach the first-grade A standard;
(2) the invention organically combines AO denitrification process, functional artificial wetland, chemical dephosphorization filter bed and other process technologies with high-efficiency denitrification and dephosphorization, each treatment tank body forms a special stacked structure in space, the liquid level difference is effectively utilized, the operation of the whole system can be completed only by once lifting, and the energy consumption is saved;
(3) the method has the advantages of low investment, quick response, daily maintenance-free property, low operation cost and the like, the technology can stably reach the first-class A standard, and some indexes can meet the IV-class standard in the 'surface water environment quality standard' through optimization and promotion of the technology. The process is an effective rural domestic sewage treatment means and has wide market prospect.
Drawings
FIG. 1: the system structure diagram of the embodiment of the invention;
FIG. 2: a method flowchart of an embodiment of the invention.
In the figure, 1, a regulating reservoir, 2, a lift pump, 3, an aerobic reservoir, 4, a functional artificial wetland, 5, a chemical dephosphorization filter bed, 6, a sludge drying reservoir, 7, a fan, 8, iron-carbon particle filler, 9, combined filler and 10, emergent aquatic plants are arranged.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the drawings and specific examples; and the following examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the raw materials used are commercially available.
Referring to fig. 1, the system for decentralized rural domestic sewage treatment provided by the invention comprises a regulating reservoir 1, a lift pump 2, an aerobic tank 3, a functional artificial wetland 4, a chemical phosphorus removal filter bed 5 and a sludge drying tank 6.
Rural domestic sewage to be treated automatically flows into a regulating tank 1, an anoxic zone (section A) is also arranged in the regulating tank 1, the sewage enters an aerobic tank 3 after being lifted by a lifting pump 2, oxygen is supplied to a water body by a fan 7, a mixed solution in the aerobic tank 3 flows back to the anoxic zone (section A) of the regulating tank 1, total nitrogen in the incoming water is removed through the biochemical action of oxygen deficiency and aerobic alternation, sludge precipitated at the bottom of the aerobic tank 3 is periodically discharged into a sludge drying tank 6 through a sludge discharge pipe, supernatant after the sludge is statically precipitated flows back to the regulating tank 1, and the sludge deposited at the bottom is naturally dried; clear water overflowing from the top of the aerobic tank 3 automatically flows into the functional artificial wetland 4, partial nitrogen, phosphorus and COD are removed by utilizing the adsorption and degradation effects of developed roots of aquatic plants, the hydraulic retention time of the functional artificial wetland 4 is controlled to be about 48 hours, and the porosity is set according to 30%; discharging the effluent into a chemical phosphorus removal filter bed 5, internally arranging an iron-carbon particle filler 8, using iron-carbon reaction to make elemental iron lose electrons to generate iron ions, carrying out flocculation reaction with sewage to generate phosphorus-containing precipitate, and adsorbing the precipitate on the surface of the iron-carbon particle filler 8, thereby effectively reducing the total phosphorus content in the water, wherein the iron-carbon particle filler 8 needs to be replaced after being adsorbed and saturated, and the replacement frequency is 1-2 years and 1 time; the effluent of the chemical phosphorus removal filter bed 5 can reach the first class A standard (GB18918-2002) of pollutant discharge standard of urban sewage treatment plants.
The sewage treatment scale of the invention is set to be below 50 tons/day, and the invention is only suitable for the treatment of small rural domestic sewage. The whole process scale forms a standardized assembly, and the integrated equipment is formed through reasonable assembly. In the season suitable for plant growth in spring and summer, after the effluent of the aerobic tank 3 is treated by the functional artificial wetland 4, if the total phosphorus content can reach the standard, the effluent is directly discharged out beyond the chemical phosphorus removal filter bed 5; during non-plant growth seasons in autumn and winter, the effluent of the functional artificial wetland 4 needs to be discharged after deep dephosphorization through the chemical dephosphorization filter bed 5.
The system of the embodiment adopts a special stacked structure, the treatment facility is divided into two layers along the vertical direction, wherein one layer is arranged above the ground, the other layer is arranged below the ground, and the height of the single-layer tank body is 1.5 m; the adjusting tank 1, the chemical phosphorus removal filter bed 5 and the sludge drying tank 6 are arranged in the underground layer; the functional artificial wetland 4 and the aerobic tank 3 are arranged on the upper layer of the ground.
The functional artificial wetland 4 of the embodiment is also internally provided with a combined filler 9, the combined filler 9 mainly comprises gravel, iron-carbon coupled filler, broken stone and soil, and the total filling height of the combined filler 9 is 800 mm. Wherein the iron-carbon coupling filler in the combined filler 9 is a filler with denitrification function.
Emergent aquatic plants 10 are planted in the functional artificial wetland 4 of the embodiment.
The chemical phosphorus removal filter bed 5 of the present embodiment is filled with an iron carbon particle filler 8, and the iron carbon particle filler 8 is prepared by carbonizing, sintering, mixing and granulating iron powder and carbon powder.
The iron carbon particle filler 8 of the embodiment is an oval particle and has a porous structure, the diameter range is 30-50mm, and the filling height of the iron carbon particle filler 8 is 500-600 mm.
The system of the embodiment can realize PLC full-automatic control.
The invention organically combines AO denitrification process, functional artificial wetland, chemical dephosphorization filter bed and other process technologies with high-efficiency denitrification and dephosphorization, each treatment tank body forms a special stacked structure in space, thereby greatly saving energy consumption, and having extremely simple operation and maintenance, and the technical principle is as follows:
firstly, an anoxic zone (section A) is arranged in a regulating tank, sewage enters an aerobic tank after being lifted for one time, ammonia nitrogen is oxidized into nitrate nitrogen through aeration of a fan, nitrified liquid automatically flows back into the anoxic zone by utilizing liquid level difference, denitrification is realized through anoxic-aerobic alternate action, and most of total nitrogen in the water can be removed through the process; sludge deposited at the bottom of the aerobic tank is periodically discharged into a sludge drying tank through a sludge discharge pipe, supernatant liquid of the sludge after standing and depositing flows back to a regulating tank, and the sludge deposited at the bottom is naturally dried through evaporation; clear water overflowing from the aerobic tank enters a functional artificial wetland, on one hand, partial nitrogen, phosphorus and COD are removed by utilizing the adsorption and degradation effects of developed root systems of emergent aquatic plants, and on the other hand, a combined filler taking gravels, an iron-carbon coupled filler, broken stones and soil as main components is filled in the wetland, wherein the iron-carbon coupled filler has a certain denitrification function, and can further reduce total nitrogen by acting with the combined filler when sewage flows through the wetland; the effluent of the wetland automatically flows into a chemical dephosphorization filter bed, iron-carbon particle fillers prepared by carbonizing, sintering and mixing and granulating iron powder and carbon powder are filled in the filter bed, the iron-carbon reaction is utilized to ensure that elemental iron loses electrons to generate iron ions, the iron ions and the sewage undergo a flocculation reaction to generate phosphorus-containing precipitates, and the precipitates are adsorbed on the surface of the iron-carbon particle fillers, so that the total phosphorus content in the water is effectively reduced, and the effluent of the chemical dephosphorization filter bed can reach the first-class A standard of pollutant discharge Standard of urban Sewage treatment plants (GB 18918-2002).
Referring to fig. 2, the method for treating distributed rural domestic sewage provided by the invention comprises the following steps:
step 1: rural domestic sewage to be treated automatically flows into the regulating tank 1, an anoxic zone (section A) is further arranged in the regulating tank 1, the sewage enters the aerobic tank 3 after being lifted by the lifting pump 2, oxygen is supplied to a water body through the fan 7, mixed liquid in the aerobic tank 3 flows back to the anoxic zone (section A) of the regulating tank 1, and total nitrogen in the sewage is removed through nitrification and denitrification under the condition of oxygen deficiency-aerobic alternation.
Step 2: sludge precipitated at the bottom of the aerobic tank 3 is periodically discharged into a sludge drying tank 6 through a sludge discharge pipe, supernatant liquid of the sludge after standing and precipitation flows back to the regulating tank 1, and the sludge precipitated at the bottom is naturally dried through evaporation; clear water overflowing from the top of the aerobic tank 3 automatically flows into the functional artificial wetland 4.
And step 3: emergent aquatic plants 10 are planted in the functional artificial wetland 4, a combined filler 9 which takes gravels, iron-carbon coupled fillers, gravels and soil as main components is filled in the functional artificial wetland, the purification treatment of the sewage is cooperatively completed by utilizing the adsorption and degradation effects of developed root systems of aquatic plants and the complex physical, chemical and biological effects of substrates, plants and microorganisms, a part of nitrogen, phosphorus and COD are removed, wherein the hydraulic retention time is controlled to be about 48 hours, the porosity is set according to 30%, and the discharged water is discharged into the chemical phosphorus removal filter bed 5. Wherein, in the seasons suitable for plant growth in spring and summer, if the total phosphorus content of the effluent of the functional artificial wetland 4 can reach the standard, the effluent exceeds the chemical phosphorus removal filter bed 5 and is directly discharged; during non-plant growth seasons in autumn and winter, the effluent of the functional artificial wetland 4 needs to be discharged after deep dephosphorization through the chemical dephosphorization filter bed 5.
And 4, step 4: the chemical phosphorus removal filter bed 5 is internally provided with iron-carbon particle fillers 8, elemental iron loses electrons by using iron-carbon reaction to generate iron ions, the iron ions and sewage undergo flocculation reaction to generate phosphorus-containing precipitates, the precipitates are adsorbed on the surfaces of the iron-carbon particle fillers 8, so that the total phosphorus content in the water is reduced, the iron-carbon particle fillers 8 need to be replaced after being adsorbed and saturated, the replacement frequency is 1-2 years and 1 time, and the effluent of the chemical phosphorus removal filter bed 5 can reach the first-class A standard (GB18918-2002) of pollutant discharge Standard of urban Sewage treatment plants.
It should be understood that parts of the specification not set forth in detail are well within the prior art.
It should be understood that the above description of the preferred embodiments is given for clarity and not for any purpose of limitation, and that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Finally, the method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A treatment system of distributed rural domestic sewage is characterized by comprising a regulating tank (1), a lift pump (2), an aerobic tank (3), a functional artificial wetland (4), a chemical phosphorus removal filter bed (5) and a sludge drying tank (6);
equalizing basin (1) is provided with sewage entry and anoxic zone, the one end in equalizing basin (1) anoxic zone is passed through elevator pump (2) and the one end intercommunication of good oxygen pond (3), the other end in equalizing basin (1) anoxic zone pass through the back flow with the other end intercommunication of good oxygen pond (3), good oxygen pond (3) are provided with fan (7) through the pipe explosion connection, good oxygen pond (3) bottom through the mud pipe with sludge drying pond (6) intercommunication, good oxygen pond (3) top pass through the overflow pipe with functional artificial wetland (4) are connected, the play water end of functional artificial wetland (4) with the end connection of intaking of chemical dephosphorization filter bed (5), be provided with iron carbon filler (8) in chemical dephosphorization filter bed (5).
2. The treatment system according to claim 1, characterized in that the treatment system is a two-layer stacked structure formed by respectively arranging an overground layer and a underground layer in the vertical direction, wherein the aerobic tank (3) and the functional artificial wetland (4) are respectively arranged above the adjusting tank (1) and the chemical phosphorus removal filter bed (5), the sludge drying tank (6) is arranged in the underground layer, and the depth of the adjusting tank (1) and the depth of the aerobic tank (3) are 1.2-1.6 m.
3. The treatment system according to claim 1 or 2, characterized in that the functional artificial wetland (4) is filled with a combined filler (9), the combined filler (9) comprises gravel, iron-carbon coupled filler, crushed stone and soil, and the filling height of the combined filler (9) is 750-880 mm.
4. The treatment system according to claim 3, characterized in that emergent aquatic plants (10) are planted in the functional artificial wetland (4).
5. The treatment system according to claim 1, wherein the iron-carbon filler (8) is formed by mixing, in a mass ratio of 3: 1-1: 4, the iron powder and the carbon powder are carbonized and sintered and then mixed and granulated.
6. The treatment system according to claim 5, wherein the iron carbon filler (8) is oval particles with a porous structure, the particle size is 30-50mm, and the filling height of the iron carbon filler (8) is 500-600 mm.
7. A method for treating distributed rural domestic sewage, which is carried out by using the treatment system of any one of claims 1 to 6, and comprises the following steps:
s1, allowing rural domestic sewage to be treated to flow into a regulating tank, allowing the rural domestic sewage to enter an anoxic zone and then enter an aerobic tank through a lift pump, and removing total nitrogen through nitrification and denitrification under the alternate circulation between the anoxic zone and the aerobic tank of the regulating tank;
s2, periodically discharging sewage into a sludge drying tank through a sludge discharge pipe by settling at the bottom of an aerobic tank, enabling denitrified clear water overflowing from the top of the aerobic tank to flow into a functional artificial wetland, and enabling supernatant liquid after standing in the sludge drying tank to flow back to the regulating tank;
s3, removing partial nitrogen and phosphorus and CAD through the combined action of emergent aquatic plants planted in the functional artificial wetland and the filled combined filler;
s4, carrying out iron-carbon reaction on iron-carbon fillers filled in the chemical phosphorus removal filter bed to generate iron ions, and flocculating the iron ions with sewage to generate phosphorus-containing sediment to reduce the total phosphorus content.
8. The treatment method as claimed in claim 7, wherein the hydraulic retention time of the functional artificial wetland in step S3 is 45-52h, and the porosity is 25-36%.
9. The treatment method according to claim 7, wherein in step S4, the iron carbon filler is replaced after being adsorbed and saturated, and the replacement frequency is 1 time every 1-2 years.
10. The treatment method according to claim 7, wherein in steps S1-S4, the sewage treatment scale is less than 50 tons/day, the treatment method is only suitable for treating small rural domestic sewage, and is suitable for plant growth seasons in spring and summer, after the effluent of the aerobic tank is treated by the functional artificial wetland, if the total phosphorus content can reach the standard, the effluent exceeds the chemical phosphorus removal filter bed to be directly discharged, and in non-plant growth seasons in autumn and winter, the effluent of the functional artificial wetland needs to reach the standard after deep phosphorus removal by the chemical phosphorus removal filter bed to be discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911079674.4A CN110655281A (en) | 2019-11-07 | 2019-11-07 | Distributed rural domestic sewage treatment system and treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911079674.4A CN110655281A (en) | 2019-11-07 | 2019-11-07 | Distributed rural domestic sewage treatment system and treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110655281A true CN110655281A (en) | 2020-01-07 |
Family
ID=69043405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911079674.4A Pending CN110655281A (en) | 2019-11-07 | 2019-11-07 | Distributed rural domestic sewage treatment system and treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110655281A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704247A (en) * | 2020-05-29 | 2020-09-25 | 上海交通大学 | Storage regulation sedimentation pond-aeration contact oxidation pond system and application method thereof |
| CN112624334A (en) * | 2020-11-23 | 2021-04-09 | 江苏一鉴塘环境科技工程有限公司 | Sewage treatment system and process for constructing ecological reactor by using pure natural substances |
| CN113024012A (en) * | 2020-12-24 | 2021-06-25 | 江苏力鼎环保装备有限公司 | Distributed household sewage treatment equipment and sewage treatment method thereof |
| CN113429064A (en) * | 2021-06-03 | 2021-09-24 | 泉州市安平碧海环保科技有限公司 | Buried AO process and high-load dephosphorization wetland system |
| CN114275975A (en) * | 2021-12-31 | 2022-04-05 | 天津环科环境规划科技发展有限公司 | Domestic sewage treatment device and method and application |
| CN114906956A (en) * | 2022-04-27 | 2022-08-16 | 江苏启创环境科技股份有限公司 | Deep phosphorus removal method for organic phosphorus wastewater adsorbed by microelectrolysis coupling nano composite material |
| CN117326693A (en) * | 2023-09-15 | 2024-01-02 | 成都理工大学 | Distributed domestic sewage treatment system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456629A (en) * | 2009-01-05 | 2009-06-17 | 北京大学 | Device of deep layer water distribution multi-medium ecological wetland sewage disposal system and method thereof |
| EP2093196A1 (en) * | 2008-02-19 | 2009-08-26 | Erik Meers | Treatment of liquid dispersions of organic material to dischargeable / re-usable water |
| CN102134147A (en) * | 2011-04-19 | 2011-07-27 | 武汉理工大学 | Modifying method for seasonally enhancing denitrification and dephosphorization by A2O process |
| CN202658011U (en) * | 2012-03-26 | 2013-01-09 | 哈尔滨工业大学宜兴环保研究院 | Double-layer potential flow constructed wetland system for sewage treatment of medium and small towns of cold regions |
| CN206384930U (en) * | 2016-12-22 | 2017-08-08 | 上海湛清环境工程有限公司 | Compound type constructed wetland system |
| CN107445415A (en) * | 2017-09-28 | 2017-12-08 | 中冶华天工程技术有限公司 | A kind of rural domestic sewage treatment system |
| CN107879477A (en) * | 2017-10-31 | 2018-04-06 | 河海大学 | Collapsible multistage Inner electrolysis drowned flow artificial wet land |
| CN208883669U (en) * | 2018-08-31 | 2019-05-21 | 湖南金旅环保股份有限公司 | A kind of integral biological ecologic coupling device for rural domestic sewage treatment |
| CN211255623U (en) * | 2019-11-07 | 2020-08-14 | 湖南九层台环境科技有限公司 | Distributed rural domestic sewage treatment system |
-
2019
- 2019-11-07 CN CN201911079674.4A patent/CN110655281A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2093196A1 (en) * | 2008-02-19 | 2009-08-26 | Erik Meers | Treatment of liquid dispersions of organic material to dischargeable / re-usable water |
| CN101456629A (en) * | 2009-01-05 | 2009-06-17 | 北京大学 | Device of deep layer water distribution multi-medium ecological wetland sewage disposal system and method thereof |
| CN102134147A (en) * | 2011-04-19 | 2011-07-27 | 武汉理工大学 | Modifying method for seasonally enhancing denitrification and dephosphorization by A2O process |
| CN202658011U (en) * | 2012-03-26 | 2013-01-09 | 哈尔滨工业大学宜兴环保研究院 | Double-layer potential flow constructed wetland system for sewage treatment of medium and small towns of cold regions |
| CN206384930U (en) * | 2016-12-22 | 2017-08-08 | 上海湛清环境工程有限公司 | Compound type constructed wetland system |
| CN107445415A (en) * | 2017-09-28 | 2017-12-08 | 中冶华天工程技术有限公司 | A kind of rural domestic sewage treatment system |
| CN107879477A (en) * | 2017-10-31 | 2018-04-06 | 河海大学 | Collapsible multistage Inner electrolysis drowned flow artificial wet land |
| CN208883669U (en) * | 2018-08-31 | 2019-05-21 | 湖南金旅环保股份有限公司 | A kind of integral biological ecologic coupling device for rural domestic sewage treatment |
| CN211255623U (en) * | 2019-11-07 | 2020-08-14 | 湖南九层台环境科技有限公司 | Distributed rural domestic sewage treatment system |
Non-Patent Citations (6)
| Title |
|---|
| 严华勇;邹仲勋;: "分层填料人工湿地处理生活污水的研究", 污染防治技术, no. 03 * |
| 余波平: "垂直流人工湿地净化湖水的除磷研究", 《环境科学导刊》, vol. 30, no. 3, pages 2 * |
| 周桑扬;付新喜;吴晓芙;冀泽华: "水溶液体系中Ca(OH)<sub>2</sub>和FeSO<sub>4</sub>的除磷效应", 湖南林业科技, no. 003 * |
| 梁建军;翟俊;何强;郭大敬;: "复合潜流人工湿地强化处理低温地区生活污水", 中国给水排水, no. 10, pages 2 * |
| 阮晓卿;蒋岚岚;陈豪;刘晋;陈秋萍;: "江苏不同地区典型农村生活污水处理适用技术", 中国给水排水, no. 18 * |
| 陈欣等: "铁碳微电解基质强化人工湿地污染物去除率的室内模拟实验", 《湿地科学》, vol. 16, no. 5, pages 170 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704247A (en) * | 2020-05-29 | 2020-09-25 | 上海交通大学 | Storage regulation sedimentation pond-aeration contact oxidation pond system and application method thereof |
| CN112624334A (en) * | 2020-11-23 | 2021-04-09 | 江苏一鉴塘环境科技工程有限公司 | Sewage treatment system and process for constructing ecological reactor by using pure natural substances |
| CN113024012A (en) * | 2020-12-24 | 2021-06-25 | 江苏力鼎环保装备有限公司 | Distributed household sewage treatment equipment and sewage treatment method thereof |
| CN113429064A (en) * | 2021-06-03 | 2021-09-24 | 泉州市安平碧海环保科技有限公司 | Buried AO process and high-load dephosphorization wetland system |
| CN114275975A (en) * | 2021-12-31 | 2022-04-05 | 天津环科环境规划科技发展有限公司 | Domestic sewage treatment device and method and application |
| CN114275975B (en) * | 2021-12-31 | 2023-11-07 | 天津环科环境规划科技发展有限公司 | Domestic sewage treatment device and method and application |
| CN114906956A (en) * | 2022-04-27 | 2022-08-16 | 江苏启创环境科技股份有限公司 | Deep phosphorus removal method for organic phosphorus wastewater adsorbed by microelectrolysis coupling nano composite material |
| CN117326693A (en) * | 2023-09-15 | 2024-01-02 | 成都理工大学 | Distributed domestic sewage treatment system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110655281A (en) | Distributed rural domestic sewage treatment system and treatment method | |
| CN107540094B (en) | Constructed wetland sewage treatment system | |
| US4415450A (en) | Method for treating wastewater using microorganisms and vascular aquatic plants | |
| CN100509664C (en) | Method for treating percolation liquid of water deficiency area garbage embedding field | |
| CN1868926A (en) | Composite ecological treatment method of sewage for artificial wet land and its system | |
| CN102531187B (en) | Method for treating domestic wastewater with combined laminated vertical flow-horizontal subsurface flow wetland | |
| CN105036467A (en) | Artificial wetland waste water pretreatment method for small-town waste water treatment | |
| CN104817239A (en) | Novel in-situ water purification system and purification method for heavily polluted river | |
| CN211255623U (en) | Distributed rural domestic sewage treatment system | |
| CN113371817A (en) | Biological retention device and preparation method of magnesium modified biochar for mixed filler of biological retention device | |
| CN110668575A (en) | Full-automatic efficient nitrogen and phosphorus removal tidal flow constructed wetland and use method thereof | |
| CN210656590U (en) | Buried rural domestic sewage treatment system | |
| CN101177317A (en) | Enhanced compounded mix multi-stage alternate wetland sewage treating process and apparatus thereof | |
| CN107352738A (en) | The composite artificial ecological bed waste water treatment system and method for a kind of intensified denitrification and dephosphorization | |
| CN112142258B (en) | Resource and standard treatment method for domestic sewage of villages and towns | |
| CN206033519U (en) | Rural domestic sewage of solar energy drips and strains processing system | |
| CN112429840A (en) | Improved artificial rapid infiltration integrated device based on agricultural waste carbon slow release enhanced biological nitrogen and phosphorus removal and application thereof | |
| CN106186321A (en) | A kind of integrated energy-saving nitrogen rejection facility and method | |
| CN102642990B (en) | Constructed wetland sewage treatment nitrous oxide discharging control system | |
| CN102060416A (en) | Method for treating low-temperature city sewage by using anoxic-oxic moving bed biomembrane reactors | |
| CN102491585B (en) | Combined method for removing nitrate nitrogen of tail water produced by municipal sewage treatment plant | |
| CN101205097A (en) | Two-stage A/O vertical flow artificial wetland sewage treatment system | |
| CN106006973B (en) | Bottom water inlet type artificial rapid infiltration system | |
| CN210103705U (en) | Environment-friendly efficient composite domestic sewage treatment system for thermal power plant | |
| CN205443003U (en) | Novel sewage treatment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |